Internal-combustion engine.



I'. B.- BAKER'. INTERNAL OOMBUSTION ENGINE. l

APPLICATION FILED JAN. 6. 1914.

Patented Mar. 16, 1915.

l/alllallllanIrI/l INVENTOR FRANK EDWARD BAKER ATTORNEYS FRANK EDWARDBAKER, 0F BIRMINGHAM, ENGLAND.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Mar. 1e, 1915.

Application led January 6, 1914. Serial N o. 810,640.

T0 all whom t may concern.'

Be it known that I, FRANK EDWARD BAKER, a subject of the King of GreatBritain, residing at Birmingham, England, have invented certain new anduseful Improvements in Internal-Combustion Engines, of which thefollowing is a specification.

This invention relates to internal combustion engines such as are usedfor propelling motor cycles and other motor vehicles and refers moreparticularly to the type of engine in which a change-speed gear iscontained in the crank casing. v

The object of the invention is to construct an improved engine of thetype aforesaid.

Referring to the accompanying drawings which illustrate the inventioncarried into effect in one convenient manner Figure 1 isa sectionalelevation of an engine for a motor cycle constructed according to theinvention. Fig. 2 is a sectional plan view on line 2, .2.

The cylinder a which may be either air or water cooled is provided withhorizontal overhead valves b which are operated by tappet levers cpivotally connected at d to the crank casing e. The latter is formed intwo parts in the usual manner and is provided with ordinary bearings y,z, to receive the crank shaft f, cam shaft g and the change speed gearand driving axle h respectively. f i

The crank shaft f which is preferably provided with balance weights iprojects through the casing e and is provided with a {1y-wheel Ze.

Secured to theshaft f is a gear wheel Z which meshes with a gear wheel mfast on the'cam shaft (l, a second gear 4wheel fn, being secured to theopposite end of the latter. These two wheels m and n'drive two gearwheels 0 and 7o respectively which are loosely mounted on the axle It.The wheels o, p are adapted to drive the axle h at a greater or lessspeed according to which of them is engaged by the clutch coupling (lslidably carried on the squared portion of the axle.

The coupling g is operated by the forked lever 1' which is connected tothe shaft s.

:Ihe latter is carried in a bearing t formed 1n the crank case e andprojects from the forward end of the same. The end of the shaft s isprovided with an operating foot lever u which extends oneither side ofthe case e to a position convenient for the operator. A spring pressedlocking bolt w carried in the casing e is adapted to enter recessesformed in the boss v of the foot lever to retain and lock the clutch gin the position to which it is set.

Cams 4, 4 on the before mentioned cam shaft are adapted to rock thetappet levers c to operate the valves o in the usual manner.

The axle z. is provided at its outer end with any desired driving meanssuch as a pulley, sprocket wheel, or worm wheel.

In use the gear Wheels Z, m, 71,50, p and the cam shaft g are constantlyrevolving. The shaft z. is driven at a greater or less speed by thewheels m or` n respectively by throwing the clutchg into engagement witheither of the wheels o or p. ,The clutch is operated by the foot lever uand retained in the adjusted position by the locking bolt w as beforedescribed.

What I claim as my invention and desire to secure by Letters Patent isIn internal combustion engines, the combination comprising a crank case,a crank shaft, a cam shaft, and a driven shaft, all mounted parallelwith each other within the crank case, a pair of wheels loosely mountedon the driven shaft, a pair of wheels secured to the cam shaft andmeshing with the wheels'on the driven shaft, a wheel on the crank shaftmeshing with one of the wheels on the cam shaft, valve operating cams onthe said cam shaft, a sliding clutch on the driven shaft adapted tosecure to the said shaft either of the wheels mounted thereon, a clutchfork. a clutch shaft carrying the said fork and journaled within thecrank case, and a pedal lever secured to the outer end of the clutchshaft, substantially as described.

In testimony whereof I have signed my name to this specification in thetwo subscribing witnesses.

JOHN MORGAN, EDWARD SILL.

presence ofv

